Dielectric behavior and energy storage properties in BaO–SrO–Nb2O5–B2O3 system glass–ceramics with Gd2O3 addition
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A series of strontium barium niobate-based borate system glass–ceramics with Gd2O3 addition have been prepared by controlled crystallization method. The effect of Gd2O3 addition on the microstructure, phase evolution and dielectric properties has been investigated. The results show that the addition of Gd2O3 to the glass–ceramics changes the dielectric property and energy-storage density. Typically, the glass–ceramics with 0.5 mol% Gd2O3 heat treated at 630 °C/2 h + 800 °C/3 h possesses a dielectric constant of 136, a breakdown strength of 1,075 kV/mm and energy-storage density of 6.94 J/cm3, which is suitable for the application in high energy-storage capacitors.
KeywordsDielectric Constant Nb2O5 Glass Matrix Gd2O3 Remnant Polarization
This work was supported by Natural Science Foundation of China (NSFC No.51162002), and Science and Technology Project of Guangxi Returned Personnel (Contract No. 2012-250).